Removing it isn't that hard, but I'd say don't try to solder if you don't have experience with very small points, or the chance is high that you fry your PS2.
How hard is it?
If 1 is easy and 10 super-hard, I'd say it is atleast a 7-8.
(Maybe only my meaning: ) Another thing is,... No, you'll need a plan for your board-revision. You can't simply remember, where which wire belongs to (a few of them are in the same location, but not all of them).
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux